AutoCodes - Cadillac - U0249 CADILLAC

U0249 CADILLAC Code - Lost Communication With Rear Entertainment Control Module

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3
Table of contents

|U0249 CADILLAC code possible causes

  • Faulty Rear Entertainment Control Module
  • Rear Entertainment Control Module harness is open or shorted
  • Rear Entertainment Control Module circuit poor electrical connection

|How do I fix the U0249 CADILLAC code?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|Cost of diagnosing the U0249 CADILLAC code

Labor: 1.0

The cost of diagnosing the U0249 CADILLAC code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|What are U0249 CADILLAC code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|U0249 CADILLAC code description

Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. The modules have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver module as an availability indication of the transmitter module. The supervision time-out period is 250 ms. Each message contains the identification number of the transmitter module. The Diagnostic Trouble Code (DTC) sets when a periodic message from the Rear Entertainment Control Module has not been received.
OBDII Code U0249 Cadillac - Lost Communication With Rear Entertainment Control Module -

|Need more information with the U0249 CADILLAC code?

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|Need help with a U0249 CADILLAC code?

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|U0249 CADILLAC code comments

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